if you want to keep it quiet, just replace with the magnaflow, keep the stock cats and resonator. you won't get loud with that displacement, and it'll have a slighty crisper note to it.
if anything, it would be just for looks. i know OCKlasse has a supersprint cat-back he's willing to sell if you hit him up, but it's still on his car and he'd need cash up front to yank it.